Boiler-furnace



(No Model.)

T. E. JONES. BOILER .PURNAGR No. 263,182. Patented Aug. 22, 1882..

i UNITED STATES PATENT GEFICE.

rrHOMAS E. JONES, OE CINCINNATI, OHIOQv SPECIFICATION forming part of Letters Patent N 0.l 263,182, dated August 22, 1882.

v Application filed June 52,1882. (No model.)

To all whom fit may concern:

Beit known that I, THOMAS E. JONES, a citizen of the United States, and a resident of Cincinnati,in the county of Hamilton and State of Ohio, have invented certain new and useful Improvementsin Boiler-Furnaces, of which the following is a specification.

My invention relates to improvements in boiler-furnaces, or more particularly to devices ro for the consumption of smoke.

The object of my invention is to provide a narrow throat or opening between the bridgewall, which has aforwardly-projecting deflecting-ledge, and the boiler by building from the 1 5 bridge-wall up to the boiler a shallow wall projecting inwardly from both sides of the furnace, and combining therewith a jet or jets of steam and air arranged to operate transversely across the fire-box or furnace-chamber, above zo the tire at the rear end thereof, near the Said bridge-wall, to check the too rapid passage of the smoke and gases produced by the burning of the fuel into the iiue before they are fully utilized. 5

2 5 Another object of my invention is to provide suitable passages in the front of the furnacechamber, above and below the grate, for the admission of air to promote combustion and Opf erate in connection with the narrowed throat 3o over the bridge-Wall and the transversely-disposed air and steam nozzles.

Another Object of my invention is to provide a gradually-descendin g iioorin the combustionchamber from the bridge-wall to or near the rear 3 5 end of the boiler to cause the llame and heated gases to spread and encompass the boiler, and thereby produce as uniform heat as .possible to all parts of the boiler within the furnace and combustion-chamber.

4o In the drawings, Figurel is a transverse sectional elevation through the tire-box of a boilerfurnace Onlinear fc, Fig. 3, showing the bridge wall, transverselyprojectin g walls, and the air and steam nozzles and connections embodying my invention. Fig.2is a broken longitudinal sectional elevation on line o; w, Fig. 1, and yy, Fig. 3. Fig. Bis a plan view on line m w', Fig. 2. Fig. 4 is a broken perspective view of a modified form of air and steam nozzles. Fig.

' 5o 5 is a central section of the same.

A represents an ordinary steam-boiler; B, the side walls, and B the front and rear walls, upon and within which it is mounted.

C is the fire-box; o, the grate-bars, set in the usual manner, and C the ash-pit. 55

D represents the bridge-wall, preferablyhaving for its top face a tile, d, whose forward edge projects beyond the face of the bridge-wall a short distance into the furnace-chamber C to act as a check for such gases and smoke that 6o come in contact with it and direct them back into the lire-box to commingle with such other gases and smoke as are in circulation iu the lire-box and combustion-chamber.

Dl D represent walls projectingtransversely from the side Walls, B, being shallow continuations of the bridge-wall D up to the boiler A, as shown in Fig. 1. These walls Dl D contractor narrow the opening Dll between the bridge-wall and boilerjust sufficient to act, in 7o connection with the ledge d, as a check to the smoke and gases between theiire-box and combustionchamber, sogas to hold them in abeyance, and thereby effectually ignite andl consume them before they can escape into the flue.

E E represent airand steam pipes connecting with pipes e, tapping side walls, B, to supply ordinary jets or nozzles, F F', 4which inject the air-and steam, or either ot them, transverselyin the rear end ofthe lire-box above the 8o ire to promote combustion and increase tbe draft. Nozzle F is preferably arranged a little in the rear of the'line ot' nozzle F', or nearer the bridge-wall, to cause circulation withintbe tire-box in front of the check-Walls. 8 5

Gr G represent air-passages in the front of the're-box above the grate-bars; H H, airpassages through the side walls, B, into the ash-pit U below the rear end of the grate-bars.

rlhe floor of the combustion-chamber I is 9o made gradually descending bylayin g the brick or tile J, composing it, preferably in step form, as shown in Figs. 2 and 3, from the upper rear end of the bridge-wall to or near the rear end of the boiler. This construction materially enhances the draft in the furnace and serves to spread the iiame so as to encompass the boiler and produce uniform heat throughout the furnace.

The arrangement herein shown and described roo of constructing a boiler-furnace is very advantageous and eficient. Itis also economical in both operation and cost ot' construction, and can readily bcapplied to the ordinary boilerfurnaces heretofore in use with but little alteration thereto.

Instead of the ordinary jets or nozzles, F F', a nozzle such as is shown in Figs. 4 and 5 may be employed. This nozzle is simply a cap, j', provided with a slit or opening, j", cut in its head, and screwed onto the end of the steam and air injector pipes e. It will be seen that this forni of nozzle will diffuse or spread the air and steam over the lire and operate effectively; but the ordinary jet hereinbefore mentioned Willaccomplish the desired end andispreferred.

I claiml In asmoke-consuming furnace, the combined air and steam nozzles extending transversely through the opposite side Walls of the furnacechamber, and one arran gedin rear ofthe other, as described, in combination with the bridge- Wall in rear of the grate, having at its upper portion a forward-projecting ledge to direct the gas and smoke back to the {ire-box, and the shallow Walls projecting` inward from the side Walls of the furnace, between the bridgefwall land the boiler, to form the contracted throat,

substantially as and for the purposes set forth. In testimony whereof I have hereunto set my hand in the presence ot' two subscribing Witnesses.

THOMAS E. JONES.

Witnesses: l FRED. A. LAMPiNG, JNO. E. JoNEs. 

